Display panel and display device including the same

ABSTRACT

A display device can include an optical electronic device disposed in a display area. To address a reduction of sensitivity of a touch panel disposed in a first sub-display area of the display area in which the optical electronic is disposed, an edge of a touch electrode in the first sub-display area can be provided with a finger part, a size of the touch electrode in the first sub-display area can be reduced, or a sub-touch electrode can be connected to the touch electrode in the first sub-display area, thereby increasing sensing sensitivity of the touch electrode.

CROSS REFERENCE TO RELATED APPLICATION

This application claims priority to Korean Patent Application No.10-2021-0190416, filed in the Republic of Korea on Dec. 28, 2021, theentire contents of which are hereby expressly incorporated by referencefor all purposes as if fully set forth herein.

BACKGROUND OF THE INVENTION 1. Field of the Invention

The present disclosure relates to a display panel and a display deviceincluding the same, and more particularly, to a display panel includingan under-display camera (UDC) area, on which optical devices such as acamera or various types of sensors are disposed, at the back of adisplay area, and having a touch panel structure for increasing touchsensitivity of a touch panel corresponding to the UDC area, when thetouch panel is included in the display panel, and a display deviceincluding the same.

2. Description of the Related Art

With technological development, display devices can provide not only afunction of displaying an image but also an image capturing device usinga camera, a three-dimensional (3D) sensing device, various types ofdetection devices using light wave detection and ranging (LiDAR) or timeof flight, etc. To this end, a display device can include an opticalelectronic device (also referred to as a light-receiving device or asensor) such as a camera and a sensor.

The optical electronic device is required to receive light from a frontside of the display device and thus should be installed in a place atwhich light is easily received. Therefore, in general, a camera (cameralens) ad a detecting sensor are installed to be exposed on a front sideof a display device. Thus, there have been attempts to increase the sizeof a bezel of a display panel or form a notch part or physical holes ina display area of the display panel so as to install a camera or varioustypes of detecting devices.

SUMMARY OF THE DISCLOSURE

To address the above noted issues and other issues associated with therelated art, a technology for providing optical electronic devices suchas a camera and a detecting sensor without reducing an area of a displayarea of a display panel is being studied.

Accordingly, the inventors of the present application have invented adisplay panel having a light transmission structure in which opticalelectronic devices are provided at the back side of a display area ofthe display panel to allow the optical electronic devices to receivelight normally without exposing the optical electronic devices on afront side of a display device, and the display device.

Embodiments of the present disclosure provide a display panel in whichoptical electronic devices are provided at the back of a display area ofthe display panel to reduce an area of a non-display area of the displaypanel and prevent the optical electronic devices from being exposed on afront side of a display device, and the display device.

Embodiments of the present disclosure provide a display panel in which atouch panel is provided on a front side of a display area of the displaypanel while preventing a decrease in touch sensitivity in the entiredisplay area including an under-display camera (UDC) area, and a displaydevice.

A display device according to an embodiment of the present disclosureincludes a display panel including a display area and a non-display areaaround the display area, wherein the display area includes a firstsub-display area including a plurality of light transmission areas and asecond sub-display area around the first sub-display area; an opticalelectronic device disposed at the back side of the display area andoverlapping the first sub-display area; and a net type touch paneldisposed on a front side of the display panel and including a firsttouch area corresponding to the first sub-display area and a secondtouch area corresponding to the second sub-display area, wherein meshesof the first touch area are larger than meshes of the second touch area,and an area corresponding to each other between each touch electrode inthe first touch area is greater than an area corresponding to each otherbetween each touch electrode in the second touch area.

The touch panel can include a capacitive touch electrode configured todetect a capacitance generated between a driving touch electrode and asensing touch electrode by a mutual capacitance sensing method.

A size of each touch electrode in the first touch area and a size ofeach touch electrode in the second touch area can be substantially thesame.

An edge of each touch electrode in the first touch area can be providedwith a first finger part extending toward neighboring touch electrodesfacing to each other, and an edge of each touch electrode in the secondtouch area can be provided with a second finger part extending towardneighboring touch electrodes facing to each other, wherein an areafacing between the edge of each touch electrode having the first fingerparts can be greater than an area facing between the edge of each touchelectrode having having the second finger parts.

The first finger part can be longer than the second finger part.

A display device according to an embodiment of the present disclosureincludes a display panel including a display area and a non-display areaaround the display area, wherein the display area includes a firstsub-display area including a plurality of light transmission areas and asecond sub-display area around the first sub-display area, an opticalelectronic device disposed at the back side of the display area andoverlapping the first sub-display area, and a net type touch paneldisposed on a front side of the display panel and including a firsttouch area corresponding to the first sub-display area and a secondtouch area corresponding to the second sub-display area, wherein meshesof the first touch area are larger than meshes of the second touch area,and a size of each touch electrode in the first touch area is less thana size of each touch electrode in the second touch area.

The touch panel can include a capacitive touch electrode configured todetect a capacitance generated between a driving touch electrode and asensing touch electrode by a mutual capacitance sensing method.

At least one driving touch electrode in the first touch area can bedirectly connected to a driving touch line, and at least one sensingtouch electrode in the first touch area can be indirectly connected to asensing touch line.

The number of bridge electrodes connecting touch electrodes disposed inthe first touch area can be greater than the number of bridge electrodesconnecting touch electrodes disposed in a region (the region is alsoreferred to as the second touch region) of the second touch area whencomparing a unit area of same size.

Sizes of touch electrodes in the first touch area can be the same, andsizes of touch electrodes in the second touch area can be the same.

The touch panel can be disposed on a touch interlayer insulating layer,and the display device can further include net type sub-touch electrodesdisposed on a rear side of the touch interlayer insulating layer andelectrically connected to touch electrodes of the touch panel that aredisposed in the first touch area.

A touch electrode separated from a neighboring touch electrode among thetouch electrodes disposed on the same touch line can be electricallyconnected to the neighboring touch electrode through the sub-touchelectrode disposed on the same touch line.

A display device according to an embodiment of the present disclosureincludes a display panel including a display area and a non-display areaaround the display area, wherein the display area includes a firstsub-display area including a plurality of light transmission areas and asecond sub-display area around the first sub-display area; an opticalelectronic device disposed at the back side of the display area andoverlapping the first sub-display area; a touch interlayer insulatinglayer on an upper side of the display panel; a net type touch paneldisposed on a one side of the touch interlayer insulating layer andincluding a first touch area corresponding to the first sub-display areaand a second touch area corresponding to the second sub-display area.

Meshes of the first touch area are larger than meshes of the secondtouch area, and the display device can further include a net typesub-touch panel disposed on the other side of the touch interlayerinsulating layer and electrically connected to the touch panel disposedin the first touch area.

The touch panel can include driving touch electrodes and sensing touchelectrodes in a form of a net, and the sub-touch panel can includesub-driving touch electrodes and sub-sensing touch electrodes in a formof a net, wherein the driving touch electrodes or the sensing touchelectrodes can be connected through one of the sub-driving touchelectrode and the sub-sensing touch electrode that are disposed on theother side of the touch interlayer insulating layer.

When the driving touch electrodes are arranged and connected along adriving touch line, the sensing touch electrodes can be arranged along asensing touch line crossing the driving touch line and disconnected fromeach other at an intersection of the driving touch line and the sensingtouch line, and can be electrically connected to each other through thesub-sensing electrode.

Meshes of the first touch area can be larger by an integer multiple ofthe meshes of the second touch area.

The sensing touch electrode and the sub-sensing electrode can beconnected to each other through a contact hole formed in the touchinterlayer insulating layer.

Sub-driving touch electrodes arranged along the driving touch line canbe physically separated from each other and each electrically connectedto corresponding one of the driving touch electrodes.

Sensing touch electrodes arranged along the sensing touch line can bephysically separated from each other and each electrically connected tocorresponding one of sub-sensing touch electrodes.

The present disclosure provides a touch panel in which opticalelectronic devices such as a camera and a detecting sensor are disposedat the back side of a display area to secure a large area of the displayarea, and which is capable of increasing touch sensitivity whilereducing a density of a touch electrode of a touch area in which opticalelectronic devices area arranged when the touch panel is included in oradded to an upper side of a display panel.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other aspects, features and advantages of the presentdisclosure will be more apparent from the following detailed descriptiontaken in conjunction with the accompanying drawings, in which:

FIGS. 1A and 1B are plan views of a display device according toembodiments of the present disclosure;

FIG. 2 is a system configuration diagram of a display device accordingto embodiments of the present disclosure;

FIG. 3 illustrates an equivalent circuit of a subpixel in a displaypanel according to embodiments of the present disclosure;

FIG. 4 is a layout diagram of subpixels in a first sub-display areaincluded in a display area of a display panel according to embodimentsof the present disclosure;

FIG. 5 is a cross-sectional view of a first sub-display area and asecond sub-display area of a display panel according to embodiments ofthe present disclosure;

FIG. 6A is a schematic diagram showing a relationship between a touchelectrode and a pixel in a display area according to embodiments of thepresent disclosure;

FIG. 6B is a schematic diagram showing a relationship between touchelectrodes divided in a part of a touch panel corresponding to a displayarea according to embodiments of the present disclosure;

FIG. 7 is a plan view of a touch panel according to embodiments of thepresent disclosure;

FIG. 8 is an enlarged view of a part A of FIG. 7 corresponding to afirst sub-display area and a second sub-display area around the firstsub-display area according to embodiments of the present disclosure;

FIG. 9 is a plan view of a structure of a touch electrode in an area ofa touch panel corresponding to a first sub-display area according to anembodiment of the present disclosure;

FIG. 10 illustrates a part of a cut line of the touch panel in an area Bcorresponding to the second sub-display area of FIG. 9 ;

FIG. 11A illustrates a part of a cut line of a touch panel in an area B′corresponding to the first sub-display area of FIG. 9 ;

FIG. 11B is a detailed diagram of a structure of FIG. 11A;

FIG. 12A is a plan view of a cut line of a touch panel in an area B′corresponding to the first sub-display area of FIG. 9 according toanother embodiment;

FIG. 12B is a detailed diagram of a structure of FIG. 12A;

FIG. 13 is a plan view of a structure of a touch electrode in an area ofa touch panel corresponding to a first sub-display area according toanother embodiment of the present disclosure;

FIG. 14 is a perspective view of a structure of a touch electrode in anarea of a touch panel corresponding to a first sub-display areaaccording to another embodiment of the present disclosure; and

FIGS. 15A, 15B, and 15C are perspective views showing examples of arelationship between touch electrodes of the embodiment of the presentdisclosure shown in FIG. 14 .

DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

Advantages and features of the present disclosure and methods ofachieving them will be apparent from embodiments described in detailbelow, in conjunction with the accompanying drawings. However, thepresent disclosure is not limited to the embodiments set forth hereinand can be embodied in many different forms. The embodiments are merelyprovided so that this disclosure will be thorough and complete and willfully convey the scope of the present disclosure to those of ordinaryskill in the art. The present disclosure should be defined by the scopeof claims.

Shapes, sizes, ratios, angles, total numbers, etc. illustrated in thedrawings to describe embodiments of the present disclosure are onlyexamples and thus the present disclosure is not limited thereto. Thesame reference numerals refer to the same components throughout thespecification. In the following description of the present disclosure,related well-known technologies are not described in detail when it isdetermined that they would obscure the subject matter of the presentdisclosure due to unnecessary detail. It will be understood that terms“comprise”, “have”, “include”, etc., when used herein, can include theaddition of other components unless “only” is used. As used herein,singular forms are intended to include plural forms as well, unless thecontext clearly indicates otherwise

It will be understood as including an error range in interpretingcomponents, unless the content clearly indicates otherwise.

When a positional relationship between two parts is described using, forexample, “on”, “above”, “below”, “beside”, or the like, one or moreother parts can be positioned between the two parts, unless“immediately” or “directly” is used.

When a temporal relationship, i.e., a temporarily contextualrelationship, is described using, for example, “after”, “subsequent to”,“next to”, “before”, etc., such terms should be understood as includingdiscontinuity, unless “immediately” or “directly” is used.

Although “first”, “second”, etc. are used herein to describe variouscomponents, the components are not limited by these terms. These termsare only used to distinguish one component from another. Therefore, afirst component described below could be termed a second componentwithout departing from the technical scope of the present disclosure.

Features of various embodiments of the present disclosure can bepartially or entirely combined with each other or be implementedtechnically in association with each other in various ways, and theembodiments can be implemented independently or together with eachother.

Hereinafter, various embodiments of the present disclosure will bedescribed in detail with reference to the accompanying drawings. All thecomponents of each display device according to all embodiments of thepresent disclosure are operatively coupled and configured.

FIGS. 1A and 1B are plan views of a display device 100 according toembodiments of the present disclosure.

Referring to FIGS. 1A and 1B, the display device 100 according to theembodiments of the present disclosure can include a display panel 110that displays an image, and one or more optical electronic devices 11.

The display panel 110 can include a display area DA in which an image isdisplayed and a non-display area NDA in which an image is not displayed.

In the display area DA, a plurality of subpixels and various types ofsignal lines for driving the plurality of subpixels can be arranged.

The non-display area NDA can be an area outside the display area DA. Inthe non-display area NDA, various types of signal lines can be arrangedand various types of driving circuits can be connected. The non-displayarea NDA can be bent and thus may not be visible from ahead or can behidden by a case. The non-display area NDA is also called a bezel or abezel area.

In the display device 100 according to the embodiments of the presentdisclosure, the one or more optical electronic devices 11 refer toelectronic components on a rear side (opposite to a viewing side) of thedisplay panel 110.

Light can enter a front side (viewing side) of the display panel 110,pass through the display panel 110, and thereafter be transmitted to theone or more optical electronic devices 11 on the rear side (opposite tothe viewing side) of the display panel 110.

The one or more optical electronic devices 11 can include an imagecapturing device using a camera, a detecting sensor such as a proximitysensor or an illumination sensor, a three-dimensional (3D) sensingdevice, various types of detection devices using light wave detectionand ranging (LiDAR) or time of flight, and the like.

In the display panel 110, the display area DA can include a general areaNA and one or more optical areas OA1. Here, the general area NA is asecond sub-display area which is a display area having no structure forimproving light transmittance to increase sensitivity of the opticalelectronic device 11. The optical area OA1 is an area having a structurefor improving light transmittance to increase sensitivity of the opticalelectronic device 11. Hereinafter, the optical area OA1 is also referredto as a first sub-display area. Thus, the display area DA includes thefirst sub-display area OA1 and the second sub-display area NA.

Referring to FIGS. 1A and 1B, the first sub-display area OA1 can be anarea that overlaps the one or more optical electronic devices 11.

FIG. 1A illustrates that the first sub-display area OA1 has a circularstructure but a shape of the first sub-display area OA1 according toembodiments of the present disclosure is not limited thereto.

For example, as shown in FIG. 1B, the first sub-display area OA1 canhave an octagonal shape or other various polygonal shapes.

In the first sub-display area OA1, both an image display structure and alight transmission structure can be formed. For example, the firstsub-display area OA1 is a part of the display area DA and subpixels fordisplaying an image can be disposed on the first sub-display area OA1.In addition, the light transmission structure for transmitting lightwith one or more optical electronic devices 11 can be formed on thefirst sub-display area OA1.

The optical electronic device 11 is a device that needs to receive lightbut is located on a rear side (a bottom or a side opposite to theviewing side) of the display panel 110 and receives light transmittedthrough the display panel 110.

The optical electronic device 11 is not exposed on the front side(viewing side) of the display panel 110. Thus, when a user views ascreen of the display device 100, the optical electronic device 11 isnot visible.

The first sub-display area OA1 can be divided into a plurality of areas.For example, when a plurality of optical electronic devices 11 such as acamera, an illumination sensor, and a LiDAR device are arranged, thefirst sub-display area OA1 can be divided into sub-display areascorresponding to the optical electronic devices 11. However, forconvenience of description, one optical electronic device 11 and thefirst sub-display area OA1 corresponding thereto will be describedherein.

Both the second sub-display area NA and the first sub-display area OA1that are included in the display area DA are areas in which images canbe displayed, but the second sub-display area NA does not need the lighttransmission structure, and the first sub-display area OA1 needs thelight transmission structure. Thus, the first sub-display area OA1should have a light transmittance greater than or equal to a certainlevel, and the second sub-display area NA can have no lighttransmittance or a light transmittance less than the certain level.

For example, the first sub-display area OA1 and the second sub-displayarea NA can be different from each other in terms of a resolution, anarrangement of subpixels, the number of subpixels per unit area, anelectrode structure, an interconnection structure, an arrangement ofelectrodes, or an arrangement of interconnections.

For example, the number of subpixels per unit area in the firstsub-display area OA1 can be less than that in the second sub-displayarea NA. For example, a resolution of the first sub-display area OA1 canbe lower than that of the second sub-display area NA. Here, the numberof subpixels per unit area is a resolution measurement unit and can beunderstood as pixels per inch (PPI), i.e., the number of pixels perinch.

In other words, a PPI of the first sub-display area OA1 can be lowerthan that in the second sub-display area NA.

The first sub-display area OA1 can have various shapes such as acircular shape, an elliptical shape, a quadrangular shape, or ahexagonal shape. For convenience of description, an example in which thefirst sub-display area OA1 has an elliptical shape will be describedhere.

When the optical electronic device 11 hidden below the display panel 110is a camera, the display device 100 according to embodiments of thepresent disclosure can be a display to which under display camera (UDC)technology, which is a commercial term, is applied. In the presentspecification, C in UDC should be understood to include not only acamera but also various types of optical electronic devices. The firstsub-display area OA1 can be also referred to as a UDC area.

Accordingly, in the case of the display device 100 according toembodiments of the present disclosure, because notches or camera holesneed not be formed in the display panel 110 to expose a camera, areduction of an area of the display area DA can be prevented, a size ofa bezel area can be reduced, and a screen can be designed freely withoutdesign constraints.

FIG. 2 is a system configuration diagram of a display device 100according to embodiments of the present disclosure.

Referring to FIG. 2 , the display device 100 can include a display panel110 and a display driving circuit as components for displaying an image.

The display driving circuit can include a data driving circuit 220, agate driving circuit 230, a display controller 240, etc., as circuitsfor driving the display panel 110.

The display panel 110 can include a display area DA in which an image isdisplayed and a non-display area NDA in which an image is not displayed.The non-display area NDA can be an outer area of the display area DA andcan be considered as a bezel area. The entire non-display area NDA or apart thereof can be an area visible from the front of the display device100 or can be bent and thus not be visible from the front of the displaydevice 100.

The display panel 110 can include a substrate SUB and a plurality ofsubpixels SP on the substrate SUB. The display panel 110 can furtherinclude various types of signal lines to drive the plurality ofsubpixels SP.

The display device 100 according to embodiments of the presentdisclosure can be a liquid crystal display device or a self-emittingdisplay device in which the display panel 110 emits light by itself.When the display device 100 according to the embodiments of the presentdisclosure is a self-emitting display device, each of the plurality ofsubpixels SP can include a light-emitting element.

For example, the display device 100 according to embodiments of thepresent disclosure can be an organic light-emitting display device inwhich a light-emitting element is embodied as an organic light-emittingdiode (OLED). As another example, the display device 100 according toembodiments of the present disclosure can be an inorganic light-emittingdisplay device in which a light-emitting element is embodied as aninorganic material-based light-emitting diode. As another example, thedisplay device 100 according to embodiments of the present disclosurecan be a quantum dot display device in which a light-emitting element isembodied as quantum dots that are semiconductor crystals that emit lightby themselves.

A structure of each of the plurality of subpixels SP can vary accordingto a type of the display device 100. For example, when the displaydevice 100 is a self-emitting display device in which subpixels SP emitlight by themselves, each of the subpixels SP can include alight-emitting element that emits light by itself, one or moretransistors, and one or more capacitors.

For example, various types of signal lines can include a plurality ofdata lines DL for transmitting data signals (which can be also referredto as data voltages or image signals), a plurality of gate lines GL fortransmitting gate signals (which can be also referred to as scansignals), and the like.

The plurality of data lines DL and the plurality of gate lines GL cancross each other. The plurality of data lines DL can be arranged whileextending in a first direction. The plurality of gate lines GL can bearranged while extending in a second direction.

Here, the first direction can be a column direction and the seconddirection can be a row direction. Alternatively, the first direction canbe the row direction and the second direction can be the columndirection.

The data driving circuit 220 is a circuit for driving the plurality ofdata lines DL and can output data signals to the data lines DL. The gatedriving circuit 230 is a circuit for driving the plurality of gate linesGL and can output gate signals to the gate lines GL.

The display controller 240 is a device for controlling the data drivingcircuit 220 and the gate driving circuit 230 and can control drivetiming of the plurality of data lines DL and drive timing of theplurality of gate lines GL.

The display controller 240 can supply a data driving control signal DCSto the data driving circuit 220 to control the data driving circuit 220,and supply a gate driving control signal GCS to control the gate drivingcircuit 230 to control the gate driving circuit 230.

The display controller 240 can receive input image data from a hostsystem 250 and supply image data Data to the data driving circuit 220 onthe basis of the input image data.

The data driving circuit 220 can supply data signals to the plurality ofdata lines DL according to drive timing controlled by the displaycontroller 240.

The data driving circuit 220 can receive digital image data Data fromthe display controller 240, convert the received image data Data intoanalog data signals, and output the analog data signals to the pluralityof data lines DL.

The gate driving circuit 230 can supply gate signals to the plurality ofgate lines GL according to timing controlled by the display controller240. The gate driving circuit 230 can be supplied with a first gatevoltage corresponding to a turn-on voltage and a second gate voltagecorresponding to a turn-off voltage, as well as the gate driving controlsignal GCS, generate gate signals, and supply the gate signals to theplurality of gate lines GL.

For example, the data driving circuit 220 can be connected to thedisplay panel 110 by a tape automated bonding (TAB) method, connected toa bonding pad of the display panel 110 by a chip-on glass (COG) orchip-on panel (COP) method, or connected to the display panel 110 by achip-on film (COF) method.

The gate driving circuit 230 can be connected to the display panel 110by the TAB method, connected to the bonding pad of the display panel 110by the COG or COP method, or connected to the display panel 110 by theCOF method. Alternatively, the gate driving circuit 230 can be a gate-inpanel (GIP) type and be formed on the non-display area NDA of thedisplay panel 110. The gate driving circuit 230 can be disposed on orconnected to a substrate. For example, the gate driving circuit 230 canbe disposed on the non-display area NDA of the substrate when the gatedriving circuit 230 is a GIP type. The gate driving circuit 230 can beconnected to the substrate when the gate driving circuit 230 is a COGtype, a COF type or the like.

At least one of the data driving circuit 220 and the gate drivingcircuit 230 can be disposed on the display area DA of the display panel110. For example, at least one of the data driving circuit 220 and thegate driving circuit 230 can be disposed not to overlap the subpixels SPor disposed to overlap some or all of the subpixels SP.

The data driving circuit 220 can be connected to one side (e.g., anupper or lower side) of the display panel 110. According to a drivingmethod, a panel design method or the like, the data driving circuit 220can be connected to both sides (e.g., upper and lower sides) of thedisplay panel 110 or two or more of four sides of the display panel 110.

The gate driving circuit 230 can be connected to one side (e.g., a leftor right side) of the display panel 110. According to a driving method,a panel design method or the like, the gate driving circuit 230 can beconnected to both sides (e.g., the left and right sides) of the displaypanel 110 or two or more of the four sides of the display panel 110.

The display controller 240 can be embodied as a component separated fromthe data driving circuit 220 or integrated into an integrated circuit(IC), together with the data driving circuit 220.

The display controller 240 can be a timing controller used in generaldisplay technology, a control device that includes a timing controllerand thus can further perform other control functions, a control deviceseparated from a timing controller, or a circuit included in a controldevice. The display controller 240 can be embodied as various types ofcircuits or electronic components such as an IC, a field programmablegate array (FPGA), an application specific integrated circuit (ASIC) ora processor.

The display controller 240 can be mounted on a printed circuit board, aflexible printed circuit or the like, and electrically connected to thedata driving circuit 220 and the gate driving circuit 230 through theprinted circuit board, the flexible printed circuit or the like.

The display controller 240 can transmit a signal to or receive a signalfrom the data driving circuit 220 according to one or more predeterminedinterfaces. Here, the one or more predetermined interfaces can include,for example, a low-voltage differential signaling (LVDS) interface, anEPI interface, a serial peripheral interface (SP), etc.

To provide not only an image display function but also a touch sensingfunction, the display device 100 according to embodiments of the presentdisclosure can include a touch sensor, and a touch sensing circuit thatdetects the touch sensor to detect whether a touch is generated by atouch object such as a finger or a pen or detect a touch position.

The touch sensing circuit can include a touch driving circuit 260 fordriving and detecting the touch sensor to generate and output touchsensing data, a touch controller 270 for detecting a generated touch ora touch position using the touch sensing data.

The touch sensor can include a plurality of touch electrodes. The touchsensor can further include a plurality of touch lines to electricallyconnect the plurality of touch electrodes and the touch driving circuit260.

The touch sensor can be provided in the form of a touch panel outsidethe display panel 110 or provided inside the display panel 110. When thetouch sensor is provided in the form of a touch panel outside thedisplay panel 110, the touch sensor is called an external type. When thetouch sensor is the external type, the touch panel and the display panel110 can be manufactured separately and combined together during anassembly process. An external type touch panel can include a substratefor a touch panel substrate and a plurality of touch electrodes on thesubstrate for a touch panel.

When the touch sensor is located inside the display panel 110, the touchsensor can be formed on the substrate SUB during the manufacture of thedisplay panel 110, together with signal lines related to driving adisplay, electrodes, etc.

The touch driving circuit 260 can supply a touch driving signal to atleast one of the plurality of touch electrodes, and generate touchsensing data by detecting at least one touch electrode of the pluralityof touch electrodes.

The touch sensing circuit can detect a touch by a self-capacitancesensing method or a mutual-capacitance sensing method.

When the touch sensing circuit detects a touch by the self-capacitancesensing method, the touch sensing circuit can detect a touch on thebasis of a capacitance between each of the plurality of touch electrodesand a touch object (e.g., a finger, a pen or the like).

According to the self-capacitance sensing method, each of the pluralityof touch electrodes can act as a driving touch electrode and a sensingtouch electrode. The touch driving circuit 260 can drive all or some ofthe plurality of touch electrodes and detect some or all of theplurality of touch electrodes.

When the touch sensing circuit detects a touch by the mutual-capacitancesensing method, the touch sensing circuit can detect a touch on thebasis of a capacitance between the touch electrodes.

According to the mutual-capacitance sensing method, the plurality oftouch electrodes are divided into driving touch electrodes and sensingtouch electrodes. The touch driving circuit 260 can drive the drivingtouch electrodes and detect the sensing touch electrodes.

The touch driving circuit 260 and the touch controller 270 that areincluded in the touch sensing circuit can be embodied as separatedevices or one device. In addition, the touch driving circuit 260 andthe data driving circuit 220 can be embodied as separate devices or onedevice.

The display device 100 can further include a power supply circuit tosupply various types of power to a display driving circuit and/or thetouch sensing circuit.

The display device 100 according to the embodiments of the presentdisclosure can be a mobile terminal such as a smart phone and a tabletPC or monitors or televisions (TVs) having various sizes but is notlimited thereto and can include displays of various types and sizescapable of displaying information or images.

FIG. 3 illustrates an equivalent circuit of a subpixel SP in a displaypanel 110 according to embodiments of the present disclosure.

Each of subpixels SP arranged in a second sub-display area NA and afirst sub-display area OA1 of a display area DA of the display panel 110can include a light-emitting element ED, a driving transistor DRT fordriving the light-emitting element ED, a scan transistor SCT forapplying a data voltage VDATA to a first node N1 of the drivingtransistor DRT, a storage capacitor Cst for maintaining a voltageconstant for one frame period, and the like.

The driving transistor DRT can include the first node N1 to which a datavoltage can be applied, a second node N2 electrically connected to thelight-emitting element ED, and a third node N3 to which a drivingvoltage ELVDD is applied from a driving voltage line DVL. In the drivingtransistor DRT, the first node N1 can be a gate node, the second node N2can be a source node or a drain node, and the third node N3 can be adrain node or a source node.

The light-emitting element ED can include an anode electrode AE, anemission layer EL, and a cathode electrode CE. The anode electrode AEcan be a pixel electrode disposed on each subpixel SP, and beelectrically connected to the second node N2 of the driving transistorDRT of each subpixel SP. The cathode electrode CE can be a commonelectrode commonly disposed on a plurality of subpixels SP, and a basevoltage ELVSS can be applied to the cathode electrode CE.

For example, the anode electrode AE can be a pixel electrode and thecathode electrode CE can be a common electrode. On the contrary, theanode electrode AE can be a common electrode and the cathode electrodeCE can be a pixel electrode. Hereinafter, for convenience ofdescription, it is assumed that the anode electrode AE is a pixelelectrode and the cathode electrode CE is a common electrode.

For example, the light-emitting element ED can be an organiclight-emitting diode (OLED), an inorganic light-emitting diode, aquantum dot light-emitting element, or the like. In this case, when thelight-emitting element ED is an OLED, the emission layer EL of thelight-emitting element ED can include an organic emission layercontaining an organic material.

The scan transistor SCT can be controlled to be turned on or off by ascan signal SCAN supplied through a gate line GL, and be electricallyconnected between the first node N1 of the driving transistor DRT andthe data line DL.

The storage capacitor Cst can be electrically connected between thefirst node N1 and the second node N2 of the driving transistor DRT.

As shown in FIG. 3 , each subpixel SP can have a 2-transistor (2T)1-capacitor (1C) structure including two transistors DRT and SCT and onecapacitor Cst, and can further include one or more transistors or one ormore capacitors in some cases.

The storage capacitor Cst can not be a parasitic capacitor, which is aninternal capacitor (e.g., Cgs, Cgd) that can be disposed between thefirst node N1 and the second node N2 of the driving transistor DRT, butcan be an external capacitor intentionally designed to be locatedoutside the driving transistor DRT.

Each of the driving transistor DRT and the scan transistor SCT can be ann type transistor or a p type transistor.

Because circuit elements in each subpixel SP (especially, thelight-emitting element ED) are vulnerable to external moisture oroxygen, an encapsulation layer ENCAP can be disposed on the displaypanel 110 to prevent permeation of external moisture or oxygen into thecircuit elements (especially, the light-emitting elements ED). Theencapsulation layer ENCAP can be arranged to cover the light-emittingelements ED.

In embodiments of the present disclosure, a touch panel TP can be addedon the encapsulation layer ENCAP The touch panel TP can be included intoa side of the encapsulation layer ENCAP or an independent touch panel TPcan be added on the encapsulation layer ENCAP

FIG. 4 illustrates an arrangement of subpixels SP in a first sub-displayarea OA1 and a second sub-display area NA that are included in a displayarea DA of a display panel 110 according to embodiments of the presentdisclosure.

Referring to FIG. 4 , a plurality of subpixels SP can be arranged ineach of the second sub-display area NA and the first sub-display areaOA1 that are included in the display area DA.

For example, the plurality of subpixels SP can include red subpixels SPthat emit red light, green subpixels SP that emit green light, and bluesubpixels SP that emit blue light.

Accordingly, each of the second sub-display area NA and the firstsub-display area OA1 can include emission areas EA of the red subpixelsSP, emission areas EA of the green subpixels SP, and emission areas EAof the blue subpixels SP.

Referring to FIG. 4 , the second sub-display area NA may not include alight transmission structure and can include the emission areas EA.

However, the first sub-display area OA1 should include not only theemission areas EA but also the light transmission structure.

Thus, the first sub-display area OA1 can include the emission areas EAand transmission areas TA1.

The emission areas EA and the transmission areas TA1 can bedistinguished from each other according to whether light is transmittedor not therewith. For example, the emission areas EA can be areas thatdo not allow light to pass therethrough, and the transmission areas TA1can be an areas that allow light to pass therethrough.

The emission areas EA and the transmission areas TA1 can bedistinguished from each other according to whether a certain metallayer, e.g., a cathode electrode CE, is formed or not. For example, thecathode electrode CE can be formed in the emission areas EA and may notbe formed in the transmission areas TA1. A light shield layer can beformed in the emission areas EA and may not be formed in thetransmission areas TA1.

The first sub-display area OA1 includes the transmission areas TA1 andthus is an area that allows light to pass therethrough.

As shown in FIG. 4 , the transmission areas TA1 of the first sub-displayarea OA1 can have a circular plane but planar structures of thetransmission areas TA1 according to embodiments of the presentdisclosure are not limited thereto.

As shown in FIG. 4 , it is assumed that in the embodiments of thepresent disclosure, the first sub-display area OA1 is located at the topof the display area DA.

FIG. 5 is a cross-sectional view of a first sub-display area OA1 and asecond sub-display area NA that are included in a display area DA of adisplay panel 110 according to the embodiments of the presentdisclosure.

Referring to FIG. 5 , a stacked structure of the second sub-display areaNA will be described below. For reference, an emission area EA in thefirst sub-display area OA1 can have the same stacked structure as anemission area EA in the second sub-display area NA.

Referring to FIG. 5 , a substrate SUB can include a first substrateSUB1, an interlayer insulating film IPD, and a second substrate SUB2.The interlayer insulating film IPD can be located between the firstsubstrate SUB1 and the second substrate SUB2. The substrate SUB caninclude the first substrate SUB1, the interlayer insulating film IPD,and the second substrate SUB2 to prevent permeation of moisture. Forexample, the first substrate SUB1 and the second substrate SUB2 can bepolyimide (PI) substrates. The first substrate SUB1 can be referred toas a primary PI substrate, and the second substrate SUB2 can be referredto as a secondary PI substrate.

Various patterns ACT, SD1, and GATE for forming transistors such as adriving transistor DRT, various insulating films MBUF, ABUF1, ABUF2, GI,ILD1, ILD2, and PAS0, and various metal Patterns TM, GM, ML1, and ML2can be arranged on the substrate SUB.

The multi-buffer layer MBUF can be disposed on the second substrateSUB2, and the first active buffer layer ABUF1 can be disposed on themulti-buffer layer MBUF.

A first metal layer ML1 and a second metal layer ML2 can be disposed onthe first active buffer layer ABUF1. Here, the first metal layer ML1 andthe second metal layer ML2 can be light shield layers LS that blocklight.

The second active buffer layer ABUF2 can be disposed on the first metallayer ML1 and the second metal layer ML2. The active layer ACT of thedriving transistor DRT can be disposed on the second active buffer layerABUF2.

The gate insulating film GI can be disposed while covering the activelayer ACT.

The gate electrode GATE of the driving transistor DRT can be disposed onthe gate insulating film GI. In this case, the gate material layer GMcan be disposed on a location on the gate insulating film GI, which isdifferent from a location at which the driving transistor DRT is formed,together with the gate electrode GATE of the driving transistor DRT.

The first interlayer insulating film ILD1 can be disposed while coveringthe gate electrode GATE and the gate material layer GM. The metalpattern TM can be disposed on the first interlay insulating film ILD1.The metal pattern TM can be provided at a location different from alocation at which the driving transistor DRT is formed. The secondinterlayer insulating film ILD2 can be disposed while covering the metalpattern TM on the first interlayer insulating film ILD1.

Two first source-drain electrode patterns SD1 can be disposed on thesecond interlayer insulating film ILD2. One of the two firstsource-drain electrode patterns SD1 is a source node of the drivingtransistor DRT, and the other is a drain node of the driving transistorDRT.

The two first source-drain electrode patterns SD1 can be electricallyconnected to one side of the active layer ACT and another side of theactive layer ACT through contact holes in the second interlayerinsulating film ILD2, the first interlayer insulating film ILD1, and thegate insulating film GI.

Apart of the active layer ACT that overlaps the gate electrode GATE is achannel area. One of the two first source-drain electrode patterns SD1can be connected to one side of the channel area of the active layerACT, and the other can be connected to another side of the channel areaof the active layer ACT.

A passivation layer PAS0 is disposed while covering the two firstsource-drain electrode patterns SD1. The planarization layer PLN can bedisposed on the passivation layer PAS0. The planarization layer PLN caninclude a first planarization layer PLN1 and a second planarizationlayer PLN2.

The first planarization layer PLN1 can be disposed on the passivationlayer PAS0.

The second source-drain electrode pattern SD2 can be disposed on thefirst planarization layer PLN1. The second source-drain electrodepattern SD2 can be connected to one of the two first source-drainelectrode patterns SD1 through a contact hole in the first planarizationlayer PLN1.

The second planarization layer PLN2 can be disposed while covering thesecond source-drain electrode pattern SD2. The light-emitting element EDcan be disposed on the second planarization layer PLN2.

In a stacked structure of the light-emitting element ED, the anodeelectrode AE can be disposed on the second planarization layer PLN2. Theanode electrode AE can be electrically connected to the secondsource-drain electrode pattern SD2 through the contact hole in thesecond planarization layer PLN2.

A bank BANK can be disposed while covering apart of the anode electrodeAE. A part of the bank BANK corresponding to the emission area EA of thesubpixel SP can be open.

A part of the anode electrode AE can be exposed through an opening (openpart) of the bank BANK. The emission layer EL can be located on a sideof the bank BANK and the opening (open part) of the bank BANK. Theentire emission layer EL or a part thereof can be located betweenadjacent banks BANK.

In the opening of the bank BANK, the emission layer EL can be in contactwith the anode electrode AE. The cathode electrode CE can be disposed onthe emission layer EL.

The light-emitting element ED can be formed by the anode electrode AE,the emission layer EL, and the cathode electrode CE. The emission layerEL can include an organic film.

An encapsulation layer ENCAP can be disposed on the light-emittingelement ED described above.

The encapsulation layer ENCAP can have a single-layer structure or amultilayer structure. For example, as shown in FIG. 5 , theencapsulation layer ENCAP can include a first encapsulation layer PAS1,a second encapsulation layer PCL, and a third encapsulation layer PAS2.

For example, the first encapsulation layer PAS1 and the thirdencapsulation layer PAS2 can be inorganic films, and the secondencapsulation layer PCL can be an organic film. Among the firstencapsulation layer PAS1, the second encapsulation layer PCL, and thethird encapsulation layer PAS2, the second encapsulation layer PCL canbe thickest and act as a planarization layer.

The first encapsulation layer PAS1 can be disposed on the cathodeelectrode CE to be most adjacent to the light-emitting element ED. Thefirst encapsulation layer PAS1 can be formed of an inorganic insulatingmaterial that is depositable at low temperature. For example, the firstencapsulation layer PAS1 can be silicon nitride (SiN_(X)), silicon oxide(SiO_(X)), silicone oxynitride (SiON) or aluminum oxide (Al₂O₃). Becausethe first encapsulation layer PAS1 is deposited in a low-temperatureatmosphere, the first encapsulation layer PAS1 can prevent damage to theemission layer EL containing an organic material vulnerable in ahigh-temperature environment during deposition process.

An area of the second encapsulation layer PCL can be less than that ofthe first encapsulation layer PAS1. In this case, the secondencapsulation layer PCL can be formed to expose both ends of the firstencapsulation layer PAS1. The second encapsulation layer PCL can act asa buffer to alleviate stress between layers due to bending of thedisplay device 100, and strengthen planarization performance. Forexample, the second encapsulation layer PCL can be acrylic resin, epoxyresin, polyimide, polyethylene, silicone oxycarbide (SiOC), or the like,and can be formed of an organic insulating material. For example, thesecond encapsulation layer PCL can be formed by an inkjet method.

The third encapsulation layer PAS2, which is an inorganic film, can beformed on the substrate SUB, on which the second encapsulation layer PCLis formed, to cover an upper side and a side of each of the secondencapsulation layer PCL and the first encapsulation layer PAS1. Thethird encapsulation layer PAS2 can minimize or block permeation ofexternal moisture or oxygen into the first encapsulation layer PAS1,which is an inorganic film, and the second encapsulation layer PCL,which is an organic film. For example, the third encapsulation layerPAS2 can be formed of an inorganic insulating material such as siliconnitride (SiN_(X)), silicon oxide (SiO_(X)), silicone oxynitride (SiON)or aluminum oxide (Al₂O₃).

A touch sensor TS can be disposed on the encapsulation layer ENCAP. Atouch sensor structure will be described in detail below.

A touch buffer layer T-BUF can be disposed on the encapsulation layerENCAP The touch sensor TS can be disposed on the touch buffer layerT-BUF.

The touch sensor TS can include touch sensor metals TSM and a bridgeelectrode BRG that are located on different layers.

A touch interlayer insulating layer T-ILD can be disposed between thetouch sensor metals TSM and the bridge electrode BRG. The touch sensormetals TSM can include driving touch electrodes and sensing touchelectrodes.

For example, the touch sensor metals TSM can include a first touchsensor metal TSM, a second touch sensor metal TSM, and a third touchsensor metal TSM that are arranged adjacent to one another. When thethird touch sensor metal TSM is located between the first touch sensormetal TSM and the second touch sensor metal TSM and the first touchsensor metal TSM and the second touch sensor metal TSM should beelectrically connected to each other, the first touch sensor metal TSMand the second touch sensor metal TSM can be electrically connected toeach other through the bridge electrode BRG located on a differentlayer. The bridge electrode BRG can be insulated from the third touchsensor metal TSM due to the touch interlayer insulating layer T-ILD.

When the touch sensor TS is formed on the display panel 110, moisture orthe like can be generated from a liquid chemical (a developing solution,an etchant or the like) or the outside. By disposing the touch sensor TSon the touch buffer layer T-BUF, a liquid chemical, moisture or the likecan be prevented from permeating the emission layer EL containing theorganic material during the manufacture of the touch sensor TS.Accordingly, the touch buffer layer T-BUF can prevent damage to theemission layer EL vulnerable to the liquid chemical or moisture.

The touch buffer layer T-BUF can be formed at a low temperature equal toor lower than a certain temperature (e.g., 100° C.) and formed of anorganic insulating material having low permittivity of 1 to 3 to preventdamage to the emission layer EL containing the organic materialvulnerable to high temperatures. For example, the touch buffer layerT-BUF can be formed of an acrylic, epoxy, or siloxane-based material.When the display device 100 is bent, the encapsulation layer ENCAP canbe damaged or a touch sensor metal on the touch buffer layer T-BUF canbe broken. Even when the display device 100 is bent, the touch bufferlayer T-BUF formed of an organic insulating material and havingplanarization performance can prevent the encapsulation layer ENCAP frombeing damaged and metals TSM and BRG of the touch sensor TS from beingbroken.

A protective layer PAC can be disposed while covering the touch sensorTS. The protective layer PAC can be an organic insulating film.

Next, a stacked structure of the first sub-display area OA1 will bedescribed with reference to FIG. 5 below.

The emission area EA in the first sub-display area OA1 can have the samestacked structure as a stacked structure of the second sub-display areaNA. Thus, a stacked structure of the transmission area TA1 in the firstsub-display area OA1 will be described in detail below.

The cathode electrode CE can be disposed in the emission areas EA of thefirst sub-display area OA1 and the second sub-display area NA but maynot be disposed in the transmission area TA1 included in the firstsub-display area OA1. For example, the transmission area TA1 in thefirst sub-display area OA1 can correspond to an opening in the cathodeelectrode CE.

In addition, the light shield layer LS including at least one of thefirst metal layer ML1 and the second metal layer ML2 is disposed on theemission areas EA included in the second sub-display area NA and thefirst sub-display area OA1 but may not be disposed on the transmissionarea TA1 in the first sub-display area OA1. For example, thetransmission area TA1 in the first sub-display area OA1 can correspondto an opening in the light shield layer LS.

The substrate SUB and the various insulating films (layers) MBUF, ABUF1,ABUF2, GI, ILD1, ILD2, PAS0, PLN (PLN1, PLN2), BANK, ENCAP (PAS1, PCL,PAS2), T-BUF, T-ILD, and PAC disposed on the emission areas EA in thesecond sub-display area NA and the first sub-display area OA1 can alsobe disposed on the transmission area TA1 in the first sub-display areaOA1.

However, in the emission areas EA in the second sub-display area NA andthe first sub-display area OA1, not only an insulating material but alsomaterial layers having electrical characteristics (e.g., a metalmaterial layer, a semiconductor layer, etc.) may not be disposed on thetransmission area TA1 in the first sub-display area OA1.

For example, referring to FIG. 5 , the metal material layers ML1, ML2,GATE, GM, TM, SD1, and SD2 and the active layer ACT related totransistors may not be disposed on the transmission area TA1.

In addition, the anode electrode AE and the cathode electrode CEincluded in the light-emitting element ED may not be disposed in thetransmission area TA1. However, the emission layer EL can be disposed inthe transmission area TA1 and can be not disposed in the transmissionarea TA1.

Therefore, because material layers having electrical characteristics(e.g., a metal material layer, a semiconductor layer, etc.) are notdisposed in the transmission area TA1 in the first sub-display area OA1,light transmittance of the transmission area TA1 in the firstsub-display area OA1 can be improved. Thus, the optical electronicdevice 11 can receive light transmitted through the transmission areaTA1 and perform a corresponding function (e.g., sensing an imagesensing).

Because the entire transmission area TA1 in the first sub-display areaOA1 or apart thereof overlaps the optical electronic device 11,transmittance of the transmission area TA1 in the first sub-display areaOA1 can be increased to operate the optical electronic device 11normally.

To this end, in the display panel 110 of the display device 100according to embodiments of the present disclosure, the transmissionarea TA1 in the first sub-display area OA1 can have a transmittanceimprovement structure (TIS).

Referring to FIG. 5 , a plurality of insulating films included in thedisplay panel 110 can include the buffer layers MBUF, ABUF1, and ABUF2between the substrates SBU1 and SUB2 and the transistors DRT and SCT,the planarization layers PLN1 and PLN2 between the transistor DRT andthe light-emitting element ED, the encapsulation layer ENCAP on thelight-emitting element ED, etc.

The plurality of insulating films included in the display panel 110 caninclude the touch buffer layer T-BUF and the touch interlayer insulatinglayer T-ILD on the encapsulation layer ENCAP

The transmission area TA1 in the first sub-display area OA1 can have, asthe TIS, a structure in which the first planarization layer PLN1 and thepassivation layer PAS0 are dented.

Among the plurality of insulating films, the first planarization layerPLN1 can include at least one irregularity portion (or depressedportion). Here, the first planarization layer PLN1 can be an organicinsulating film.

When the first planarization layer PLN1 is dented, planarization can beperformed actually using the second planarization layer PLN2. Meanwhile,the second planarization layer PLN2 can also be depressed. In this case,planarization can be performed actually using the second encapsulationlayer PCL.

Depressed portions of the first planarization layer PLN1 and thepassivation layer PAS0 can extend to an upper portion of the secondsubstrate SUB2 while passing through the insulating films ILD2, IDL1,and GI for forming the transistor DRT and the buffer layers ABUF1,ABUF2, and MBUF below the insulating films ILD2, IDL1, and GI.

The substrate SUB can include at least one concave part as a TIS. Forexample, in the transmission area TA1, an upper side of the secondsubstrate SUB2 can be depressed or penetrated.

The first encapsulation layer PAS1 and the second encapsulation layerPCL, which constitute the encapsulation layer ENCAP, can also have adepressed TIS. Here, the second encapsulation layer PCL can be anorganic insulating film.

In some cases, the substrate SUB may not include a concave part in thetransmission area TA1, and the first encapsulation layer PAS1 and thesecond encapsulation layer PCL, which constitute the encapsulation layerENCAP, can have a flat side.

The protective layer PAC can be disposed while covering the touch sensorTS on the encapsulation layer ENCAP to protect the touch sensor TS.

The touch sensor TS can include a net-type touch sensor metal TSM. Forexample, when the touch sensor TS is disposed in the first sub-displayarea OA1, the touch sensor TS includes a plurality of first touch sensorlines TSL1 arranged in parallel at certain intervals in a firstdirection and a plurality of second touch sensor lines TSL2 arranged ina direction crossing the first touch sensor lines TSL1 so as to improvelight transmittance of the first sub-display area OA1.

A structure of the touch sensor TS and the relationship betweensubpixels will be described in detail with reference to FIG. 6A below.

In the display panel 110 including the first sub-display area OA1, a nettype touch sensor TS is configured to improve light transmittance of thefirst sub-display area OA1 and prevent a reduction of touch sensitivity.

Referring to FIG. 6A, the net type touch sensor TS form a net form by aplurality of first touch sensor lines TSL1 arranged in parallel atcertain intervals in a first direction, which can be an X-axisdirection, and a plurality of second touch sensor lines TSL2 arranged inparallel at certain intervals in a second direction, which can be aY-axis direction, crossing the first touch sensor lines TSL1.

One grid divided by the first touch sensor lines TSL1 and the secondtouch sensor lines TSL2 form meshes of a net. The meshes of the net canbe referred to as meshes.

One sub-pixel SPX is disposed to correspond to each mesh. Therefore, anemission layer disposed on a sub-pixel is not hidden by a touch sensormetal.

In addition, in the touch sensor TS, the first touch sensor lines TSL1and the second touch sensor lines TSL2 are cut in a certain pattern toform a touch sensor metal TSM.

A configuration of the touch sensor metal TSM of the net type touchsensor TS will be described in detail with reference to FIG. 6B below.

In detail, the touch sensor metal TSM includes driving touch electrodesTXE and sensing touch electrodes RXE that are adjacent to each other.Adjacent driving touch electrodes TXE are electrically connected to forma driving touch line TXL. When the sensing touch electrode RXE islocated between driving touch electrodes TXE, the driving touchelectrodes TXE can be connected to each other through the bridgeelectrode BRG. In contrast, when the driving touch electrode TXE islocated between sensing touch electrodes RXE, the sensing touchelectrodes RXE can be connected to each other through the bridgeelectrode BRG.

Referring to FIG. 6B, because all of the first touch sensor lines TSL1and the second touch sensor lines TSL2 constituting the net type touchsensor TS are located on a touch interlayer insulating layer, the nettype touch sensor TS can be cut along a cutting line CL into the drivingtouch electrodes TXE and the sensing touch electrodes RXE to be dividedinto touch sensor metals TSM.

As a result, referring to FIG. 8 , the driving touch electrodes TXE andthe sensing touch electrodes RXE can form a diamond shape when viewedfrom a distance.

Referring to FIG. 6B, the driving touch electrodes TXE and the sensingtouch electrodes RXE can be separated along two cutting lines CL spaceda certain distance from each other to prevent short circuit between thedriving touch electrodes TXE and the sensing touch electrodes RXE.

FIG. 7 is a schematic plan view of a touch panel. A touch panel TPincludes driving touch electrodes TXE and sensing touch electrodes RXEthat are arranged in a matrix.

Adjacent driving touch electrodes TXE are connected through a firstbridge electrode BRG1 to form driving touch lines TXL. In FIG. 7 , thedriving touch lines TXL can be interconnections arranged in the X-axisdirection.

Adjacent sensing touch electrodes RXE are connected through a secondbridge electrode BRG2 to form sensing touch lines RXL.

Because a short circuit can occur when the first bridge electrode BRG1and the second bridge electrode BRG2 are located on the same plane, onebridge electrode BRG among the first bridge electrode BRG1 and thesecond bridge electrode BRG2 can be located below the touch interlayerinsulating layer T-ILD to connect neighboring electrodes. For example,the first bridge electrode BRG1 can be located below the touchinterlayer insulating layer T-ILD to connect driving touch electrodesTXE to each other. In this case, the second bridge electrode BRG2 can belocated on the touch interlayer insulating layer T-ILD and integrallyformed with an adjacent sensing touch electrode RXE to connect sensingtouch electrodes RXE to each other. The first bridge electrode BRG1 canbe connected to the driving touch electrode TXE on the touch interlayerinsulating layer T-ILD through a contact hole CH-T formed in the touchinterlayer insulating layer T-ILD.

The driving touch line TXL can be connected to a touch pad TP1 through adriving touch link line TXLL, which can be disposed in a non-displayarea NDA, and the sensing touch line RXL can be connected to a touch padTP2 through a sensing touch link line RXLL.

An enlarged view in which an area A corresponding to parts of the firstsub-display area OA1 and the second sub-display area NA of FIG. 7 willbe described with reference to FIG. 8 below.

FIG. 8 illustrates an example in which driving touch electrodes TXE arearranged in an X-axis direction and sensing touch electrodes RXE arearranged in a Y-axis direction. However, the opposite is possible.

A touch panel TP corresponding to a display area DA has a net form inwhich a grid is formed by first touch sensor lines TSL1 arranged to bespaced a first distance from each other and second touch sensor linesTSL2 arranged to be spaced the first distance from each other whilecrossing the first touch sensor lines TSL1 (TSL1 and TSL2 are shown inFIG. 12A). A distance between the first touch sensor lines TSL1 and adistance between the second touch sensor lines TSL2 can be differentfrom each other. However, it is assumed that in this example, thedistance between the first touch sensor lines TSL1 and the distancebetween the second touch sensor lines TSL2 are the same.

For reference, a touch panel disposed in the display area DA can bedivided into a first touch area corresponding to a first sub-displayarea OA1 and a second touch area corresponding to a second sub-displayarea NA.

The distance between the first touch sensor lines TSL1 and the distancebetween the second touch sensor lines TSL2 are the same in the entiresecond sub-display area NA excluding the first sub-display area OA1.

However, in the first sub-display area OA1, the distance between thefirst touch sensor lines TSL1 and the distance between the second touchsensor lines TLS2 can be a second distance greater than the firstdistance. This is not to prevent light from entering a touch paneldisposed in the first sub-display area OA1. For example, as the distancebetween the first touch sensor lines TSL1 and the distance between thesecond touch sensor line TSL2 are reduced, the amount of light enteringthe first sub-display area OA1 from the outside is reduced.

The second distance can be greater by an integer multiple of the firstdistance. For example, the first touch sensor lines TSL1 and the secondtouch sensor lines TSL2 arranged in the second sub-display area NA canbe arranged at the first interval. The first touch sensor lines TSL1 andthe second touch sensor lines TSL2 arranged in the first sub-displayarea OA1 can be arranged at the second interval greater than the firstinterval. Accordingly, only some of the first touch sensor lines TSL1and the second touch sensor lines TSL2 arranged in the secondsub-display area NA can be arranged to correspond to the first touchsensor lines TSL1 and the second touch sensor lines TSL2 arranged in thefirst sub-display area OA1. For example, the first touch sensor linesTSL1 and the second touch sensor lines TSL2 of every two or every threein the second sub-display area NA does not match the first touch sensorlines TSL1 and the second touch sensor lines TSL2 in the firstsub-display area OA1. Therefore, the first touch sensor lines TSL1 andthe second touch sensor lines TSL2 in the first sub-display area OA1 arearranged at a lower density than a density in which the first touchsensor lines TSL1 and the second touch sensor lines TSL2 are arranged inthe second sub-display area NA, so that the second distance is greaterby an integer multiple of the first distance.

As such, when a density in which touch sensor lines are arranged in thefirst sub-display area OA1 and a density in which touch sensor lines arearranged in the second sub-display area NA are different from eachother, touch sensitivity of a touch sensor metal in the firstsub-display area OA1 can decrease.

Therefore, in a first embodiment of the present disclosure, a method ofincreasing areas of neighboring touch sensor metals is provided tocompensate for a reduction of touch sensitivity due to a low density oftouch sensor lines in the first sub-display area OA1.

Specifically, FIG. 8 illustrates a comparison between an area Ccorresponding to the inside of a touch sensor metal on a secondsub-display area and an area C′ corresponding to the inside of a touchsensor metal on a first sub-display area, and a comparison between anarea B corresponding to a border between touch sensor metals on thesecond sub-display area and an area B′ corresponding to a border betweentouch sensor metals on the first sub-display area.

FIG. 9 is a plan view of an actual structure in which a touch sensormetal to which the first embodiment of the present disclosure is appliedis disposed in a first sub-display area OA1 and a second sub-displayarea NA.

Referring to FIG. 8 , touch sensor lines are arranged at a lower densityin the first sub-display area OA1.

On the other hand, referring to FIG. 9 , a comparison between an area Bcorresponding to a border between touch sensor metals in a secondsub-display area and an area B′ corresponding to a border between touchsensor metals in a first sub-display area reveals that a touch sensormetal includes a finger structure in the area B′ corresponding to theborder between the touch sensor metals in the first sub-display area.

For example, when the mutual capacitance method is employed for a touchsensor, a capacitance increases when an area between a driving touchelectrode TXE and a neighboring sensing touch electrode RXE isincreased. Therefore, in the first embodiment of the present disclosure,edges of the driving touch electrode TXE and the sensing touch electrodeRXE can have the finger structure.

This will be described with reference to FIGS. 10 and 11A below. FIG. 10illustrates a structure of a cutting line formed at a border between adriving touch electrode TXE and a sensing touch electrode RXE in thesecond sub-display area NA of FIGS. 8 and 9 . Referring to FIG. 10 , aspace between the driving touch electrode TXE and the sensing touchelectrode RXE is cut in a zigzag pattern along a cutting line CL to formfingers each having a first length with extending to the driving touchelectrode TXE or the sensing touch electrode RXE. A total length of thefingers is marked as K.

On the other hand, in the first sub-display area OA1, a cutting line Lis formed in the zigzag pattern between the driving touch electrode TXEand the sensing touch electrode RXE to extend deeply into the drivingtouch electrode TXE or the sensing touch electrode RXE. For example,edges of the driving touch electrode TXE and the sensing touch electrodeRXE in the first sub-display area OA1 are provided with fingersextending deeply into the driving touch electrode TXE or the sensingtouch electrode RXE. When a length of fingers formed in the firstsub-display area OA1 is K′, K′ is longer than K.

Therefore, areas of edges of a driving touch electrode TXE and a sensingtouch electrode RXE facing each other in the first sub-display area OA1can increase, thus increasing a mutual capacitance.

Borders between driving touch electrodes TXE and sensing touchelectrodes RXE facing each other among all of driving touch electrodesTXE and sensing touch electrodes RXE in the first sub-display area OA1are provided with fingers longer than fingers formed in borders of thesecond sub-display area NA.

In the first embodiment of the present disclosure, the sizes of thedriving touch electrode TXE and the sensing touch electrode RXE can besubstantially the same in the first sub-display area OA1 and the secondsub-display area NA.

FIG. 11B illustrates a configuration of a finger FG formed by cutting afirst touch sensor line TSL1 and a second touch sensor line TSL2 in anarea B′ in a first sub-display area OA1 along a cutting line.

In the first embodiment of the present disclosure, a finger can have adifferent shape. Referring to FIG. 12A, the finger can enter, in avillous form, the driving touch electrode TXE and the sensing touchelectrode RXE. Therefore, areas of the driving touch electrode TXE andthe sensing touch electrode RXE can increase when edges of the drivingtouch electrode TXE and the sensing touch electrode RXE face each other.

FIG. 12B illustrates a configuration of a finger FG formed by cutting afirst touch sensor line TSL1 and a second touch sensor line TSL2 in anarea B′ in a first sub-display area OA1 along a cutting line.

FIG. 13 suggests another structure in which a capacitance between touchelectrodes in a first sub-display area OA1 increases, according to asecond embodiment of the present disclosure.

Referring to FIG. 13 , densities in which a first touch sensor line TSL1and a second touch sensor line TSL2 are arranged in the firstsub-display area OA1 are the same as those in the first embodiment ofFIG. 7 . A description thereof may be omitted or may be providedbriefly.

However, in the second embodiment, sizes of touch sensor metals TSMdisposed in the first sub-display area OA1 can be less than those oftouch sensor metals TSM disposed in a second sub-display area NA (Inhere, Touch sensor metal TSM means touch electrode TXE and touchelectrode RXE).

The sizes of the touch sensor metals TSM in the second sub-display areaNA can be substantially the same. The sizes of the touch sensor metalsTSM in the first sub-display area OA1 can also be substantially thesame. However, the sizes of the touch sensor metals TSM in the firstsub-display area OA1 are less than those of the touch sensor metals TSMin a second sub-display area NA.

Therefore, the number of touch sensor metals TSM per unit area in thefirst sub-display area OA1 can be increased, thereby increasing thenumber of bridge electrodes BRG per unit area.

Actually, the driving touch electrode TXE and the sensing touchelectrode RXE are spaced hundreds of micrometers (μm) apart from eachother, whereas the size of the bridge electrode BRG is severalmicrometers (μm). Therefore, many bridge electrodes BRG per unit areacan be understood to mean that a mutual capacitance is large.

Therefore, in the second embodiment of the present disclosure, thenumber of bridge electrodes BRG per unit area can be increased byreducing a size of a touch sensor metal TSM to be disposed in the firstsub-display area OA1, thereby increasing a capacitance.

Meanwhile, touch sensor metals TSM are connected to each other in acolumn, thus forming the driving touch line TXL and the sensing touchline RXL. In other words, the touch sensor metal TSM can be directlyconnected to the driving touch line TXL and the sensing touch line RXL.

However, in the second embodiment of the present specification, the sizeof the touch sensor metals TSM in the first sub-display area OA1 is lessthan that of the touch sensor metals TSM in the second sub-display areaNA, and thus, some of the touch sensor metals TSM in the firstsub-display area OA1 cannot be directly connected to the driving touchlines TXL or the sensing touch lines RXL and can be indirectly connectedto the driving touch lines TXL or the sensing touch lines RXL.

For example, referring to FIG. 13 , a driving touch electrode TXE-f inthe first sub-display area OA1 can be connected to the driving touchline TXL through a driving touch electrode TXE-g in the firstsub-display area OA1. Similarly, a sensing touch electrode RXE-h in thefirst sub-display area OA1 can be connected to the sensing touch lineRXL through a sensing touch electrode RXE-i in the first sub-displayarea OA1.

Of course, it is clear that some of the touch sensor metals TSM in thefirst sub-display area OA1 can be directly connected to the drivingtouch line TXL or the sensing touch line RXL.

In the second embodiment of the present disclosure, the touch sensormetal TSM can also be defined by cutting a first touch sensor line TSL1and a second touch sensor line TSL2 along a cutting line in a net formas shown in FIG. 6B.

Next, a third embodiment of the present disclosure will be describedwith reference to FIGS. 14 to 15C below.

In the third embodiment, a touch panel TP includes a touch panel TPformed on a touch interlayer insulating layer T-ILD and a sub-touchpanel STP corresponding to a first sub-display area OA1 and disposedbelow the touch interlayer insulating layer T-ILD. The touch panel TPcan have the same structure as the touch panel TP of the firstembodiment described above.

For example, the touch panel TP can include a first touch areacorresponding to the first sub-display area OA1 and a second touch areacorresponding to a second sub-display area NA, and sizes of meshesarranged in the first touch area can be greater than those of meshesarranged in the second touch area. One of the driving touch electrodesTXE and the sensing touch electrodes RXE can be directly connected toeach other and the other of the driving touch electrodes TXE and thesensing touch electrodes RXE can be connected to each other through abridge electrode BRG.

In this case, the bridge electrode BRG can be disposed below the touchinterlayer insulating layer 620.

In the third embodiment of the present disclosure, a sub-touch panel STPis further formed below the touch interlayer insulating layer 620 in thefirst sub-display area OA1 to increase sensing sensitivity of a touchsensor metal disposed in the first sub-display area OA1. A touch sensormetal TSM on the touch interlayer insulating layer 620 in the firstsub-display area OA1 and touch sensor metals in the sub-touch panel STPcan be electrically connected to one another.

A configuration of the sub-touch panel STP can be the same as that ofthe touch sensor metal TSM on an upper side of the touch interlayerinsulating layer 620 in the first sub-display area OA1. However, arelationship between touch sensor metals can be different to avoid ashort circuit between a driving touch electrode TXE and a sensing touchelectrode RXE formed on the same plane.

A relationship between a touch sensor metal TSL in a first sub-displayarea OA1 and a sub-touch sensor metal below a touch interlayerinsulating layer 620 in the first sub-display area OA1 will be describedwith reference to FIGS. 15A to 15C below.

The touch sensor metal TSM in the first sub-display area OA1 includes adriving touch electrode TXE and a sensing touch electrode RXE. Thesub-touch sensor metal below the touch interlayer insulating layer 620in the first sub-display area OA1 includes a sub-driving touch electrodeS-TXE and a sub-sensing touch electrode S-RXE.

An example will be described with reference to FIG. 15A below.

A first driving touch electrode TXE1 and a second driving touchelectrode TXE2 can be disposed along a driving touch line TXL on thetouch interlayer insulating layer 620 in the first sub-display area OA1and electrically connected to each other. In the embodiment of FIG. 15A,the first driving touch electrode TXE1 and the second driving touchelectrode TXE2 can be integrally connected.

In a touch sensor metal TSM below the touch interlayer insulating layer620 in the first sub-display area, a first sub-driving touch electrodeS-TXE1 and a second sub-driving touch electrode S-TXE2 are disposedalong the driving touch line TXL and electrically disconnected from eachother.

The first driving touch electrode TXE1 and the first sub-driving touchelectrode S-TXE1 can be connected to each other on at least one pointthrough a contact hole passing through the touch interlayer insulatinglayer 620. The second driving touch electrode TXE2 and the secondsub-driving touch electrode S-TXE2 can be connected to each other on atleast one point through a contact hole passing through the touchinterlayer insulating layer 620. Therefore, when the first sub-displayarea OA1 is touched by a finger, the driving touch electrode TXE and thesub-driving touch electrode S-TXE on and below the touch interlayerinsulating layer 620 can be operated together.

A relationship between sensing touch electrodes RXE in the firstsub-display area OA1 will be described with reference to FIG. 15B below.

A first driving touch electrode TXE1 and a second driving touchelectrode TXE2 can be disposed along a driving touch line TXL on thetouch interlayer insulating layer 620 in the first sub-display area OA1,and electrically connected to each other. In the embodiment of FIG. 15A,the first driving touch electrode TXE1 and the second driving touchelectrode TXE2 can be integrally connected.

In a touch sensor metal TSM below the touch interlayer insulating layer620 in the first sub-display area, a first sub-driving touch electrodeS-TXE1 and a second sub-driving touch electrode S-TXE2 are disposedalong the driving touch line TXL and electrically disconnected from eachother.

The first driving touch electrode TXE1 and the first sub-driving touchelectrode S-TXE1 can be connected to each other on at least one pointthrough a contact hole passing through the touch interlayer insulatinglayer 620. The second driving touch electrode TXE2 and the secondsub-driving touch electrode S-TXE2 can be connected to each other on atleast one point through a contact hole passing through the touchinterlayer insulating layer 620. Therefore, when the first sub-displayarea OA1 is touched by a finger, the driving touch electrode TXE and thesub-driving touch electrode S-TXE on and below the touch interlayerinsulating layer 620 can be operated together.

A relationship between sensing touch electrodes RXE on the firstsub-display area OA1 will be described with reference to FIG. 15B below.

A first driving touch electrode TXE1 and a second driving touchelectrode TXE2 can be disposed along a driving touch line TXL on thetouch interlayer insulating layer 60 in the first sub-display area OA1,and electrically connected to each other. In the embodiment of FIG. 15A,the first driving touch electrode TXE1 and the second driving touchelectrode TXE2 can be integrally connected.

A first sensing touch electrode RXE1 and a second sensing touchelectrode RXE2 can be disposed along a sensing touch line RXL on thetouch interlayer insulating layer 620 in the first sub-display area OA1,and electrically disconnected from each other.

A first sub-sensing touch line S-RXE1 and a second sub-sensing touchelectrode S-RXE2 disposed below the touch interlayer insulating layer620 in the first sub-display area OA1 can be arranged along the sensingtouch line RXL, and electrically connected to each other.

The first sensing touch electrode RXE1 and the first sub-sensing touchelectrode S-RXE1 can be connected to each other on at least one pointthrough a contact hole passing through the touch interlayer insulatinglayer 620. The second sensing touch electrode RXE2 and the secondsub-sensing touch electrode S-RXE2 can be connected to each other on atleast one point through a contact hole passing through the touchinterlayer insulating layer 620. Therefore, when the first sub-displayarea OA1 is touched by a finger, the sensing touch electrode RXE and thesub-sensing touch electrode S-RXE on and below the touch interlayerinsulating layer 620 can be operated together.

FIG. 15C illustrates a configuration of a combination of the drivingtouch electrode TXE and the sensing touch electrode RXE described above.

Thus, referring to FIG. 15C, a first sensing touch electrode RXE1 and asecond sensing touch electrode RXE2 disconnected from each other can beelectrically connected to each other by being respectively connected toa first sub-sensing touch electrode S-RXE1 and a second sub-sensingtouch electrode S-RXE2 connected to each other. Similarly, a firstsub-driving touch electrode S-TXE1 and a second sub-driving touchelectrode S-TXE2 disconnected from each other can be electricallyconnected to each other by being respectively connected to a firstdriving touch electrode TXE1 and a second driving touch electrode TXE2connected to each other.

In the third embodiment, the sub-driving touch electrodes S-TXE1 andS-TXE2 and the sub-sensing touch electrodes S-RXE1 and S-RXE2 below thetouch interlayer insulating layer 620 can be configured as a metal layerthat is the same as a bridge electrode provided in the first and secondembodiments. For example, in third embodiment, actually, the firstsub-sensing touch electrode S-RXE1 and the second sub-sensing touchelectrode S-RXE2 below the touch interlayer insulating layer 620 can actas a bridge electrode for connecting the first sensing touch electrodeRXE1 and the second sensing touch electrode RXE2.

On the other hand, although the first, second and third embodiments havebeen described separately, the configuration of the third embodiment canbe added to the first and second embodiments to increase touch sensingsensitivity in the first sub-display area OA1.

For example, in the configuration of the first embodiment employing thefinger structure, a sub-touch sensing metal connected to a touch sensingmetal on the touch interlayer insulating layer 620 can be configuredbelow the touch interlayer insulating layer 620 as in the thirdembodiment.

In addition, in the configuration of the second embodiment in which atouch sensor metal smaller than that in the second sub-display area NAis provided in the first sub-display area OA1, a sub-touch sensor metalaccording to the third embodiment can be provided to increase touchsensing sensitivity.

Although the embodiments of the present disclosure have been describedabove in more detail with reference to the accompanying drawings, thepresent disclosure is not necessarily limited thereto and can beimplemented in many different forms without departing from the technicalscope of the present disclosure. Therefore, the embodiments set forthherein are not intended to limit the technical scope of the presentdisclosure but are provided to describe the technical scope of thepresent disclosure, and thus the technical scope of the presentdisclosure is not limited by the embodiments. Therefore, it should beunderstood that the embodiments of the disclosure described above aremerely examples in all respects and not restrictive. The scope of thepresent disclosure should be interpreted based on the claims, and itshould be understood that all technical ideas equivalent thereto fallwithin the scope of the present disclosure.

What is claimed is:
 1. A display device comprising: a display panelincluding a display area and a non-display area adjacent to the displayarea, wherein the display area includes a first sub-display areaincluding a plurality of light transmission areas and a secondsub-display area adjacent to the first sub-display area; an opticalelectronic device disposed at a back side of the display area andoverlapping the first sub-display area; and a net type touch paneldisposed on a front side of the display panel, and including a firsttouch area corresponding to the first sub-display area and a secondtouch area corresponding to the second sub-display area, wherein meshesof the first touch area are larger than meshes of the second touch area,and an area facing each other between each touch electrode in the firsttouch area is greater than an area facing each other between each touchelectrode in the second touch area when comparing within a unit area ofsame size.
 2. The display device of claim 1, wherein the net type touchpanel comprises a capacitive touch electrode configured to detect acapacitance generated between a driving touch electrode and a sensingtouch electrode by a mutual capacitance sensing method.
 3. The displaydevice of claim 2, wherein a size of each touch electrode in the firsttouch area and a size of each touch electrode in the second touch areaare the same.
 4. The display device of claim 2, wherein an edge of eachtouch electrode in the first touch area includes a first finger partextending toward neighboring touch electrodes adjacent to each other, anedge of each touch electrode in the second touch area includes a secondfinger part extending toward neighboring touch electrodes adjacent toeach other, and an area facing between the edge of each touch electrodehaving the first finger parts is greater than an area facing between theedge of each touch electrode having the second finger parts whencomparing within a unit area of same size.
 5. The display device ofclaim 4, wherein the first finger part is longer than the second fingerpart.
 6. The display device of claim 1, wherein the net type touch panelis disposed on a touch interlayer insulating layer, and the displaydevice further comprises net type sub-touch electrodes disposed belowthe touch interlayer insulating layer and electrically connected totouch electrodes of the net type touch panel disposed on the touchinterlayer insulating layer.
 7. The display device of claim 6, wherein atouch electrode separated from a neighboring touch electrode among thetouch electrodes disposed on a same touch line is electrically connectedby a sub-touch electrode disposed on the same touch line.
 8. The displaydevice of claim 1, wherein meshes of the first touch area are larger byan integer multiple of meshes of the second touch area.
 9. A displaydevice comprising: a display panel including a display area and anon-display area adjacent to the display area, wherein the display areaincludes a first sub-display area including a plurality of lighttransmission areas and a second sub-display area adjacent to the firstsub-display area; an optical electronic device disposed at a back sideof the display area and overlapping the first sub-display area; and atouch panel disposed on a front side of the display panel, and includinga plurality of first touch sensor lines arranged in parallel atpredetermined intervals in a first direction and a plurality of secondtouch sensor lines arranged in a direction crossing the plurality offirst touch sensor lines, wherein the first touch sensor lines and thesecond touch sensor lines in the first sub-display area are arranged ata lower density than a density in which the first touch sensor lines andthe second touch sensor lines are arranged in the second sub-displayarea, and wherein an area facing each other between each touch electrodein the first sub-display area is greater than an area facing each otherbetween each touch electrode in the second sub-display area whencomparing within a unit area of same size.
 10. A display devicecomprising: a display panel including a display area and a non-displayarea adjacent to the display area, wherein the display area includes afirst sub-display area including a plurality of light transmission areasand a second sub-display area adjacent to the first sub-display area; anoptical electronic device disposed at a back side of the display areaand overlapping the first sub-display area; and a net type touch paneldisposed on a front side of the display panel, and including a firsttouch area corresponding to the first sub-display area and a secondtouch area corresponding to the second sub-display area, wherein meshesof the first touch area are larger than meshes of the second touch area,and a size of each touch electrode in the first touch area is less thana size of each touch electrode in the second touch area.
 11. The displaydevice of claim 10, wherein the net type touch panel comprises acapacitive touch electrode configured to detect a capacitance generatedbetween a driving touch electrode and a sensing touch electrode by amutual capacitance sensing method.
 12. The display device of claim 11,wherein at least one driving touch electrode in the first touch area isdirectly connected to a driving touch line, and at least one sensingtouch electrode in the first touch area is indirectly connected to asensing touch line.
 13. The display device of claim 10, wherein thenumber of bridge electrodes connecting touch electrodes disposed in thefirst touch area is greater than the number of bridge electrodesconnecting touch electrodes disposed in a region of the second toucharea comparing within a unit area of same size.
 14. The display deviceof claim 10, wherein sizes of touch electrodes in the first touch areaare the same, and sizes of touch electrodes in the second touch area arethe same.
 15. A display device comprising: a display panel including adisplay area and a non-display area adjacent to the display area,wherein the display area includes a first sub-display area including aplurality of light transmission areas and a second sub-display areaadjacent to the first sub-display area; an optical electronic devicedisposed at a back side of the display area and overlapping the firstsub-display area; a touch interlayer insulating layer on an upper sideof the display panel; a net type touch panel disposed on one side of thetouch interlayer insulating layer, and including a first touch areacorresponding to the first sub-display area and a second touch areacorresponding to the second sub-display area, wherein meshes of thefirst touch area are larger than meshes of the second touch area; and anet type sub-touch panel disposed on another side of the touchinterlayer insulating layer and electrically connected to the net typetouch panel disposed in the first touch area.
 16. The display device ofclaim 15, wherein the net type touch panel comprises driving touchelectrodes and sensing touch electrodes in the form of net, thesub-touch panel comprises sub-driving touch electrodes and sub-sensingtouch electrodes in the form of net, and the driving touch electrodes orthe sensing touch electrodes are connected through one of thesub-driving touch electrode and the sub-sensing touch electrode that aredisposed on the another side of the touch interlayer insulating layer.17. The display device of claim 16, wherein, when the driving touchelectrodes are arranged and connected along a driving touch line, thesensing touch electrodes are arranged along a sensing touch linecrossing the driving touch line and disconnected from each other at anintersection of the driving touch line and the sensing touch line, andare electrically connected to each other through the sub-sensingelectrode.
 18. The display device of claim 17, wherein the sensing touchelectrode and the sub-sensing electrode are connected to each otherthrough a contact hole formed in the touch interlayer insulating layer.19. The display device of claim 17, wherein sub-driving touch electrodesarranged along the driving touch line are physically separated from eachother, and each of the sub-driving touch electrodes electricallyconnects to corresponding one of the driving touch electrodes.
 20. Thedisplay device of claim 17, wherein sensing touch electrodes arrangedalong the sensing touch line are physically separated from each otherand each of the sensing touch electrodes electrically connects tocorresponding one of sub-sensing touch electrodes.